/*
 * $Header: /home/jerenkrantz/tmp/commons/commons-convert/cvs/home/cvs/jakarta-commons//httpclient/src/java/org/apache/commons/httpclient/Wire.java,v 1.9 2004/06/24 21:39:52 mbecke Exp $
 * $Revision: 480424 $
 * $Date: 2006-11-29 06:56:49 +0100 (Wed, 29 Nov 2006) $
 *
 * ====================================================================
 *
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 *
 */

package org.apache.commons.httpclient;

import java.io.IOException;
import java.io.InputStream;
import java.io.ByteArrayInputStream;
import org.apache.commons.logging.Log;

/**
 * Logs data to the wire LOG.
 * 
 * @author <a href="mailto:oleg@ural.ru">Oleg Kalnichevski</a>
 * 
 * @since 2.0beta1
 */
class Wire {

	// public static Wire HEADER_WIRE = new
	// Wire(LogFactory.getLog("httpclient.wire.header"));

	// public static Wire CONTENT_WIRE = new
	// Wire(LogFactory.getLog("httpclient.wire.content"));

	/** Log for any wire messages. */
	private Log log;

	private Wire(Log log) {
		this.log = log;
	}

	private void wire(String header, InputStream instream) throws IOException {
		StringBuffer buffer = new StringBuffer();
		int ch;
		while ((ch = instream.read()) != -1) {
			if (ch == 13) {
				buffer.append("[\\r]");
			} else if (ch == 10) {
				buffer.append("[\\n]\"");
				buffer.insert(0, "\"");
				buffer.insert(0, header);
				// LOG.debug(buffer.toString());
				buffer.setLength(0);
			} else if ((ch < 32) || (ch > 127)) {
				buffer.append("[0x");
				buffer.append(Integer.toHexString(ch));
				buffer.append("]");
			} else {
				buffer.append((char) ch);
			}
		}
		if (buffer.length() > 0) {
			buffer.append("\"");
			buffer.insert(0, "\"");
			buffer.insert(0, header);
			// LOG.debug(buffer.toString());
		}
	}

	public boolean enabled() {
		return log.isDebugEnabled();
	}

	public void output(InputStream outstream) throws IOException {
		if (outstream == null) {
			throw new IllegalArgumentException("Output may not be null");
		}
		wire(">> ", outstream);
	}

	public void input(InputStream instream) throws IOException {
		if (instream == null) {
			throw new IllegalArgumentException("Input may not be null");
		}
		wire("<< ", instream);
	}

	public void output(byte[] b, int off, int len) throws IOException {
		if (b == null) {
			throw new IllegalArgumentException("Output may not be null");
		}
		wire(">> ", new ByteArrayInputStream(b, off, len));
	}

	public void input(byte[] b, int off, int len) throws IOException {
		if (b == null) {
			throw new IllegalArgumentException("Input may not be null");
		}
		wire("<< ", new ByteArrayInputStream(b, off, len));
	}

	public void output(byte[] b) throws IOException {
		if (b == null) {
			throw new IllegalArgumentException("Output may not be null");
		}
		wire(">> ", new ByteArrayInputStream(b));
	}

	public void input(byte[] b) throws IOException {
		if (b == null) {
			throw new IllegalArgumentException("Input may not be null");
		}
		wire("<< ", new ByteArrayInputStream(b));
	}

	public void output(int b) throws IOException {
		output(new byte[] { (byte) b });
	}

	public void input(int b) throws IOException {
		input(new byte[] { (byte) b });
	}

	public void output(final String s) throws IOException {
		if (s == null) {
			throw new IllegalArgumentException("Output may not be null");
		}
		output(s.getBytes());
	}

	public void input(final String s) throws IOException {
		if (s == null) {
			throw new IllegalArgumentException("Input may not be null");
		}
		input(s.getBytes());
	}
}
